vsMars
Head-to-head

Marshall - Stockwell III vs Sonos - Era 100 Portable (rumored)

Last updated · How Mars Score works
Stockwell IIIMARSHALLILLUSTRATION
Probe A
Marshall
Stockwell III
61.4/ 100C
Audio45· 40%
Durability52· 30%
Battery89· 30%
Era 100 Portable (rumored)SONOSILLUSTRATION
Probe B
Sonos
Era 100 Portable (rumored)
53.0/ 100D
Audio35· 40%
Durability71· 30%
Battery53· 30%
The fork

Where they actually differ

The most decisive specs, ranked by how much they matter — before the full spec table.

SpecMarshall - Stockwell IIISonos - Era 100 Portable (rumored)
Battery27 h12 h
Low-end response50 Hz55 Hz
Water resistanceIPX4IP55
Output power30 W0 W
Quick verdict

Between the Stockwell III and Era 100 Portable (rumored), the Stockwell III comes out ahead in battery / low-end response, while the Era 100 Portable (rumored) wins on water resistance. Overall, the Stockwell III scores 61.4 and the Era 100 Portable (rumored) scores 53 on our Mars Score.

Buying advice

Which should you buy?

The Stockwell III is the clear pick on raw spec strength, leading by 8.4 points on the Mars Score. The margin is wide enough that the underdog only makes sense if its individual strengths line up with what you specifically need.

Pick the Stockwell III if you care most about battery / low-end response. The biggest gaps in its favor are battery, low-end response, output power. The single most decisive one: Battery — 125.00% more. 27 h vs 12 h.

Pick the Era 100 Portable (rumored) if you care most about water resistance. Its strongest claims are water resistance. The single most decisive one: Water resistance: IP55 (vs IPX4).

Both ship with comparable stereo pairing, so those specs do not separate the two — focus on the differences below.

Bottom line: the Stockwell III is the safer default. The other model is the right choice only when its specific advantages line up with your priorities.

Decision guide

Which should you buy: Marshall - Stockwell III or Sonos - Era 100 Portable (rumored)?

Marshall - Stockwell III leads the current Mars Score by 8.4 points.The more useful decision is the trade-off behind that result: compare output power, battery, water resistance against the way you will actually use the product.

Choose Marshall - Stockwell III if…

Marshall - Stockwell III has the measurable edge on battery h, frequency low hz, output w.

Choose Sonos - Era 100 Portable (rumored) if…

Sonos - Era 100 Portable (rumored) has the measurable edge on ip rating.

This is a structured comparison of the published catalog values. It is not a claim of identical real-world performance across every workload; use the linked spec drill-downs and methodology page to inspect the inputs.

Why Marshall - Stockwell III wins

  • ▲Battery — 125.00% more. 27 h vs 12 h.
  • ▲Low-end response — 5.00 Hz less. 50 vs 55.
  • ▲Output power: 30 W vs 0 W.

Why Sonos - Era 100 Portable (rumored) wins

  • ▲Water resistance: IP55 (vs IPX4).
Full readout

Spec comparison

Audio

SpecMarshall - Stockwell IIISonos - Era 100 Portable (rumored)
Output power30 Wlead0 W
Low-end response50 Hzlead55 Hz
Stereo pairingⓘtruetrue

Durability

SpecMarshall - Stockwell IIISonos - Era 100 Portable (rumored)
Water resistanceⓘIPX4IP55lead
Weight1390 g950 glead

Battery

SpecMarshall - Stockwell IIISonos - Era 100 Portable (rumored)
Battery27 hlead12 h
USB out (powerbank)falsefalse
Drill down

Spec-level deep dives

Output power→Low-end response→Stereo pairing→Water resistance→Weight→Battery→USB out (powerbank)→
By manufacturer

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